//req 常用参数 
const express=require('express')
let app=express()
app.get('/index',(req,res)=>{
// console.log(req.params)
// console.log(req.path)
// console.log(req.query)
// console.log(req.route)
console.log(req.get("Accept"))
res.send('hello')
})
app.listen(8989)